Moderne Softwareentwicklung mit Java zeichnet sich dadurch aus, dass Technologie- und Infrastrukturcode weitgehend von der Business-Logik separiert werden. Das Domain orientierte Design kann somit im Vordergrund stehen und die Software trotzdem um technische Aspekte erweiterbar bleiben. Dieser Wunsch wurde von einigen Entwicklern der Community aufgenommen und es entstand ein eigenes Spring Unterprojekt. Acegi erweitert eine bestehende Anwendung mit seinen fertigen Komponenten durch Konfiguration. Viele Komponenten kann man leicht durch eigene spezielle Implementierungen austauschen.

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Acegi Security in one hour A concise guide to securing your Java Web applications By ShriKant Vashishtha JavaWorld Acegi Security has been generating some serious positive buzz among Java enterprise developers, so you might be wondering how it works. In this article, ShriKant Vashishtha walks you through all the steps of a hands-on Acegi Security implementation. Acegi Security is a powerful and flexible security solution for Java enterprise applications built using the Spring framework.

Spring-based dependency injection makes Acegi easy to configure and implement in a completely nonintrusive way. This is a boon to organizations that might not want to implement the Spring framework as a whole but still need effective, reusable security for legacy applications.

This article gives you a concise jump-start to implementing Acegi Security for a basic order-processing application. After working through the example, you should be able to set up basic form-based security for any Web application in about an hour. The application could just as easily be built using Struts 2, and the Struts 2 infrastructure is already in place in the source code, though not implemented.

I used Spring dependency injection to implement Acegi security for the application. See the Resources section to download the application source code. Follow these steps to set up the application environment: Step 1. Step 2. Listing 1. Adding servlet filters to web. The targetClass parameter locates the first object of the specified class in the application context. In the configuration in Listing 1, that class is org.

The related bean object in the application context is filterChainProxy, shown in Listing 2. Listing 2. You could instead get away with using a more general filter mapping, as shown in Listing 3. Listing 3. You can avoid this trap by using specific URL patterns.

Order is essential when placing servlet filters.


Spring 4 Security

Authentication flow[ edit ] Diagram 1 shows the basic flow of an authentication request using the Spring Security system. It shows the different filters and how they interact from the initial browser request, to either a successful authentication or an HTTP error. If "Authentication mechanism" receives back the fully populated Authentication object, it will deem the request valid, put the Authentication into the SecurityContextHolder; and cause the original request to be retried. If, on the other hand, the AuthenticationProvider rejected the request, the authentication mechanism will ask the user agent to retry. AbstractSecurityInterceptor authorizes the regenerated request and throws Java exceptions. Asks AccessDecisionManager for decision. ExceptionTranslationFilter translates the exceptions thrown by AbstractSecurityInterceptor into HTTP related error codes Error code — if the principal has been authenticated and therefore simply lacks sufficient access Launch an AuthenticationEntryPoint — if the principal has not been authenticated which is an authentication mechanism Key authentication features[ edit ] Single sign-on capabilities using the popular Central Authentication Service.


Acegi Security in one hour



Spring Security


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